ESP32 Forum

I'm testing Modubs RTU example.
Whenever I tried to read Input Register value.
I can see 02 Illegal Data Address.

I'm using Modbus Poll window program to check Modbus communication.
other functions are working well such as Coils, Discrete Input, Holding Registers.

I use code from example here:

https://github.com/espressif/esp-idf/bl ... in/slave.c

@chikichaka ,

The slave configures two register areas for input registers:

Reg input area 1: 0, length: 8
Reg input area 2: 158, length: 8


If you configure Modbus poll to read these registers you will get the data correctly.